Process for extracting gold from gold-bearing ore

Details Process for extracting gold from gold-bearing ore Process for extracting gold from gold-bearing ore

C - Chemistry, Metallurgy

22

B

C22B 3/04 (2006.01) C22B 11/00 (2006.01)

Patent

CA 2644407

A process for extracting gold from a gold-bearing ore. The process includes, first, providing a leaching liquor with thiosulfate anion and ethylenediamine. Next, the leaching liquor is contacted with the gold-bearing ore to form a pregnant leach solution including gold dissolved from the gold-bearing ore. Finally, at least part of the gold in the pregnant leach solution is recovered.

L'invention concerne un procédé d'extraction d'or d'un minerai aurifère, qui comporte les étapes consistant à: former d'abord une liqueur de lixiviation renfermant un anion thiosulfate et de l'éthylènediamine; mettre ensuite la liqueur de lixiviation en contact avec le minerai aurifère pour former une solution de lixiviation mère comprenant l'or dissous du minerai aurifère; et récupérer au moins une partie de l'or de la solution de lixiviation mère.

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